http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Marine pool, Madison County, Illinois, Silurian-reef producer
"Reprinted from Structure of Typical American Oil Fields, volume III, American Association Petroleum Geologists (April, 1948)"
Report of investigations (Illinois State Geological Survey) ; no. 131